Modbus Gateway(Mini)
21
Step 2: Please refer to Chapter 5.3.3 and conduct matched resistance setting for
Modbus Gateway(Mini).
Note:
In Modbus bus, if the connected Modbus Gateway(Mini) exceeds 30 or
communication distance exceeds 800m, one photoelectric isolation repeater shall be
added. Connect the R+ and R- port of photoelectric isolation repeater with the R+ and
R- port of RS485 communication port of nearby Modbus Gateway(Mini).